Continuous process for producing polyarylene sulfide

Details Continuous process for producing polyarylene sulfide Continuous process for producing polyarylene sulfide

1997-11-26

1999-04-27

Krass, Frederick

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From sulfur-containing reactant

528388, C08G 7516

Patent

active

058980610

ABSTRACT:
This invention provides a method for producing polyarylene sulfide continuously, comprising; 1) polymerization step wherein polyarylene sulfide is polymerized from a sulfur compound in the liquid or gas state and a dihalogenated aromatic compound in non-protonic organic solvent, 2) separation step wherein mixture of the polymerization solution and the washing solution is separated into the polymer phase and the solvent phase, and in said separation step said polymer phase is continuously taken out in the liquid state. The method of this invention makes it possible to produce polyarylene sulfide of high purity that it is suitable for molding and injection molding of the seat, the film, the fiber, etc. for the electronic and electric material field etc., with high-molecular-weight and low content of by-products, efficiently and economically.

REFERENCES:
patent: 5756654 (1998-05-01), Sase et al.

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